> Thanks, Evert! I could check now that the table is correct - and, with
> some experimenting, I found the mistake I had made too: I had, in
> models.py, in class Admin, entered "ordering = ('nummer')" instead of
> "ordering = ['nummer']".
>
> Perhaps somebody can explain why list_display and list_filter require
> a tuple, and ordering and search_fields require a list?
I don't know the options all by heart, but I'm guessing any iterable
will work.
However, ('nummer') is not a tuple, it's a string (surrounded by
parenthesis).
('nummer',) , with the *extra* comma, is a single-element tuple, and
very likely will work (as well as ['nummer'] will).
Easy (and probably common) mistake to make though.
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